Metallic packing-ring.



/ PATENTED JULY 14, 1908. G. W. CARTER. METALLIC PACKING RING. APPLICATION FILED AUG...27'. 1907.

5 SHEETS-SHEET 1 PATBNTED JULY 14, 1908. c. w. CARTER. f MBTALLIG'PAGKING RING.

APPLICATION FILED AUG. 27. 1907- 5 SHEETS-SHEET 3' v PATENTED JULY 14, 1908. I G. W. CARTER. METALLIC PACKING RING. APPLICATION FILED AUG. 27,1907.

6 SHEETS-SHEET 4.

PATENTED JULY 14, 1908.

G. W. CARTER. METALLIC PACKING RING. APPLIGATIONIILED we. 27. 1907.

5 SHEETSSHEET 5.

CHARLES WILLIAM CARTER, OF LIVERPOOL, ENGLAND.

METALLIC PACKING-RING.

Specification of Letters Patent.

Patented July 14, 1908.

Application filed August 27, 1907. Serial No. 390,392.

To all whom it may concern:

Be it known that I, CHARLES WILLIAM CARTER, a subject of the King of Great Britain, and residing in Liverpool, in the county of Lancaster, England, have invented certain new and useful Improvements in Metallic Packin Rings for Piston-Rods and the Like, of whic the following is a specification.

This invention relates to metallic packing rings for piston rods and the like and is especially applicable to metallic packings of the type described in the specification to Letters Patent No. 16,174 of 1893, granted to me. In metallic packings of this class it is usual to employ two complete rings each consisting of two or more segments; these two rings encircle the rod to be packed, and are arranged so that their adjoining plane surfaces are in contact in such manner that the segments break joint and are so pressed to gether and on to the rod as to make a fluidtight joint. It is found in practice that of these two rings, the one which is more remote from the main body of pressure fluid the leakage of which is to be prevented, wears more rapidly than. the nearer one; in a piston rod packing, for instance, the ring remote from the neck ring wears much more rapidly than the nearer one, and this applies not only to packings of the special type described in my prior specification referred to, but also to metallic packings of this kind generally.

The object of my present invention is to so modify the construction of the rings as to avoid this objectionable unequal wear.

I have illustrated my invention in the accompanying drawings, in which Figures 1 and 2 show, in part sectional elevation on the line A. A. of Fig. 2, and in plan, respectively, a pair of rings constructed according to my invention; Figs. 3 and 4 show the lower ring in plan, and sectional elevation on the line B. B. of Fig. 3, respectively, and Figs. 5 and 6 show the upper ring in plan, and sectional elevation on the line C. O. of Fig. 5 respectively. Figs. 7 to 12 are analogous views to Figs. 1 to 6 of a modification in which the wear retarding flanges 4 instead of being tangential as at 4 Figs. 1 to 6, are concentric. Figs. 1 to 6 and Figs. 7 to 12 show a form of packing which I term the A type in which the lower ring consists of wearing segments 2*, of which there are at parts 2 least three, and V parts 2", of which there are also at least three. In Figs. 13 to 18 and Figs. 19 to 24, (which are, respectively, views analogous to Figs. 1 to 6 and Figs. 7 to 12), I have illustrated what I term the B type of packing in which the lower ring consists of two wearing parts 2, and two guide Figs. 13 to 18 differ from Figs. 19 to 24 in the same respect that Figs. 1 to 6 differ from Figs. 7 to 12, viz :that in Figs. 13 to 18 the wear retarding flanges are tangential, whereas in Figs. 19 to 24 they are concentric. I have shown by way of exam- ,ple, in Figs. 25 and 26, a stufling box with a pair of rings in position; Fig. 25 being partly in section on the line D. D. .of Fig. 26, and Fig. 26 a plan view in section on the line E. E. of 25. Fig. 27 is a View of a modification.

Referring in the first place to Figs. 1 to 62-1 is the rod to be'packed, 2 the lower ring consisting of, in the case illustrated, four wearing segments 2 and four V parts 2 each of the former is provided with an upwardly projecting tangential flange 4 which bears on the tangential parts of the upper ring 3 as shown in Fig. 2. These flanges prevent the wearing segments of the lower ring from feeding in at a greater rate than that permitted by the rate of wear of the upper ring; in this way the wear of the tworings is co-ordinated, the rate of wear of the upper ring controlling that of the lower one;

In Figs. 1 to 6 the flanges 4 which are tangential, are effective in holding the two rings 2 and 3 in proper relative position.

The rings are pressed together axially, and the component parts of the respective rings are pressed radially inwardly by any suitable form of springs; these may be either encircling springs of the garter type, or bow or C springs, or spiral springs arranged radially and axially; in Figs. 25 and 26 radial springs 5 are provided, located in the radial holes 5 formed in the lower ring 2, to press the segments inwardly, the floating ring 6 forming the abutment for the springs; the axial pressure is 'obtained by a series of spiral springs 7 located in holes 7 formed in the follower ring 8, the neck ring 9 forming the abutment for these springs. In Fi s. 25 and 26 two further rings 10 and 11 are s own .the cylinder 13 by studs 14 which are adapted to form a ball and socket joint to permit the rod to swing; the ring 11 is carried in the cover 12 which is secured to passing through the distance piece 15.

In Figs. 1 to 24 the springs and other minordetails, are, for the sake of clearness, omitted.

Referring now to Figs. 7 to 12:The arrangement here is substantially the same as thatshown in Figs. 1 to 6, except that the wear retarding flanges 4 are now concen tric; this construction is adopted in the case of certain types of packing and has the advantage that the flange 4 is formed in the lathe it will be noted that the V rings 2 also now carry the wear retarding flange although this may if desired be cut ofl these parts when, after turning and boring, the ring is divided into segments. As the flange 4 is concentric, one or more dowel pins are provided in this flange and fit loosely into holes formed in the segments of the upper ring 3; one of these 16 is shown in position in Fig. 8, but for the sake of omitted from the rest of the figures.

In the arrangement shown in Figs. 1 to 6 the upper ring 3 is provided with tangential peripheral portions 3, and with V gaps 3 to permit the segments to feed in as wear takes place; in Figs. '2' to 12 the ring 3 is an iannulus with the V gaps 3 cut out as beore.

Figs. 13 to 18 illustrate the B type in which the lower ring consists of two wearing parts 2, and two guide parts 2 each of the former is provided with the wear retarding flange 4 which is now tangential and the upper ring 3 has corresponding tangential peripheral portions 3*; there are gaps 3 between the two parts which gaps in this case are not V shape.

Figs. 19 to 24 also illustrate the B type but the wear retarding flanges now are concentric as in Figs. 7 to 12; dowel pins 16 are in this case also required (one only being shown in Fig. 20); the upper ring 3 is now annular with a gap 3" between the two parts.

I have referred to the segments 2 as wear ing segments but it will be understood of course that the V parts 2 also wear, but to a less extent.

The rings are made of any suitable metal or alloy adapted to wear evenly under the conditions usually met with in packings of this kind; or in some cases the rings, or parts of them, may consist of gun metal shells, in the main of the shape described in the drawings and adapted to hold an antifrietion alloy 17, as indicated in the 'perspective view Fig. 27.

In constructing the rings I find it best to shape them in segments, and to fit these accurately together, after which they are temporarily secured together in position, say by clearness they are soldering, and turned and bored they are then separated and are ready for fitting to the rod.

Having now fully described my invention, I declare that what I claim, and desire to secure by Letters Patent is 1. In a metallic packing, in combination;means for holding the packing rings in position on the rod, means for pressing the rings radially into contact with the rod, two divided rings which make contact at a com mon plane normal to the axis of the rod; the ring nearer the neck ring lying wholly on. the neck ring side of the said plane, but the segments of the other ring having retarding flanges which project beyond said plane and engage with the periphery of the first mentioned ring, substantially as described.

2. I11 a metallic packing, in combination;means for holding the packing rings in position on the rod, means for pressing the rings radially into contact with the rod, two divided rings which make contact at a common plane normal to the axis of the red, the

ring nearer the neck ring lying wholly on the neck ring side of the said plane, but the segments of the other ring having retarding flanges which project beyond said plane and engage with the periphery of the first mentioned ring, the ring remote from the neck ring being divided into a series of wearing segments and an alternate series of segn'lents which act as guides for the wearing segments, substantially as described.

3. In a metallic packing, in combination;means for holding the packing rings in position on the rod, means for pressing the rings radially into contact with the rod, two

divided rings which make contact at a common plane normal to the axis of the rod, the ring nearer the neck ring lying wholly on the neck ring side of the said plane, but the segments of the other ring having retarding flanges which project beyond said plane and. engage with the periphery of the first mentioned ring, the ring remote from the neck ring being divided into a series of wearing segments and an alternate series of segments which act as guides for the wearing segments, each of the said wearing segments engaging with the peripheries of two of the wearing segments of the ring nearer the neck ring substantially as described.

1. In a metallic packing, in combination;means for holding the packing rings in position on the rod, means for pressing the rings radially into contact with. the rod, two divided rings which make contact at a common plane normal to the axis of the red, the ring nearer the neck ring lying wholly on the. neck ring side of the said plane, but the seg ments of the other ring having retarding flanges which project beyond said plane and engage with the periphery of the first mentioned ring, the ring remote from the neck ring being divided into a series of wearing segments and an alternate series of segments which act as guides for the wearing segments, the retarding flanges on the said segments having tangentially disposed inner surfaces which engage with the tangentially disposed surfaces of the wearing segments of the ring nearer the neck ring, substantially as described.

5. In a metallic packing, in combin'a tion;-means for holding the packing rings in position on the rod, means for pressing the rings radially into contact with the rod, two divided rings which make contact at a common plane normal to the axis of the rod, the

ring nearer the neck ring lying wholly on the the neck ring side of the said plane and being divided into two parts with tangential peripheries, the other ring being made infour arts, two guide parts with parallel inner aces and two wearing segments each provided with two retarding flanges projecting beyond the said common plane, the said four retarding flanges engaging respectively with the four tangential portions of the eripheries of the ring nearer the neck ring, substantially as described. I

6, In a metallic acking, in combination:means for holding the packing rings in position on the rod; means for ressing the rings radially into contact with t e rod; and

two rings each divided into a plurality of wearing segments, the wearing segments of the one ring having projecting flanges whose inner configurations, viewed transversely, form parts of the sides of a polygonal figure, and the outer peripheries of the other ring having faces which fit within the said polygonal figure; substantially as described.

7. In a metallic packing, in combination:means for holding the packing rings in position on the rod means for pressing the rings radially into contact with the rod; two rings one of which is divided into a plurality of wearing segments and V pieces, and the other divided into a plurality'of wearing segments, the wearing segments of the first mentioned ring being provided with projectingiflanges whose inner surfaces form, when viewed transversely, parts of the sides of a polygonal figure, the peripheries of the Wearing segments of the other ring having faces which fit within the said polygonal figure; substantially as described.

8. In a metallic packing, in combination means for holding the packing rings in position on the rods means for pressing the rings radially into position on the rod; and two rings, the one of which is divided by oblique planes into a plurality of wearing segments and V pieces, the wearing segments being provided with projecting flanges the inner surfaces of which are tangents to a common cylindrical surface concentric with the rod; and the other ring being divided into a plurality of wearing segments, part of the peripheral bounding surfaces of which are also tangential to the said concentric cylindrical surface and which fit within the flanges; substantially as described.

9. In a metallic packing, incombination means for holding the packing rings in position on the rod; means for pressing the rings radially into position on the rod; and two rings, the one of which is divided into a plurality of hollow wearing segments filled in with anti-friction metal and provided with projecting flanges engaging with the other ring; substantially as described.

1 0. In a metallic packing, in combination means for holding the packing rings in position on the rod; means for pressing the rings radially into position on the rod; and two rings, the ring which tends to wear more rapidly being provided with wear retarding flanges adapted to engage with the other ring and limit the wear of the former ring so that it corresponds with that of the latter; substantially as described.

1 1. In a metallic packing, in combination a ring remote from the neck ring, having wearing segments and V parts to permit the wearing rings to be fed in; a ring nearer the neck ring divided so that its parts may be fed in to take u wear; springs and rings adapted to provi e the necessary axial and radial pressure and provide a fluid-tight joint; and tangential wear retarding flanges on the wearing segments of the one ring adapted'to engage with the tangential pe ripheral ortions of the other ring; substantially as escribed.

1 2. In a metallic packing, in combination a ring remote from the neck ring having wearing segments and V parts to permit the wearing segments tobe fed in; a ring nearer the neck ring divided so that its parts may be fed in to take up wear; springs and rings adapted to provide the necessary axial and radial pressure and provide a fluid-tight joint; and concentric wear retarding flanges on the wearing segments of the one .ring adapted to engage with the concentric peripheral portions of the other ring; substantially as described.

1 3. In a metallic packing, in combination a ring remote from the neck ring having two wearing segments and twoguide parts; a ring nearer the neck ring formed in two parts with gaps between to permit it being fed in to take up wear; springs and rings adapted to provide the necessary axial and radial pressure and provide a fluid-tight joint; and tangential wear retarding flanges on the wearing segments of the one ring adapted to engage with the tangential portions of the other ring; substantially'as described,

14. In a metallic packing, in combination a ring remote'from the neck ring having two wearing segments and two guide parts; a ring nearer the neck ring formed in two parts with gaps between to permit it being fed in to take up Wear; springs and rings adapted to provide the necessary axial and radial pressure and provide a fiuid-tight joint; and concentric wear retarding fianges'on the wearing segments of the one ring adapted to engage with the concentric portions of the other ring; substantially as described.

1 5. In a metallic packing, incombination the stufling box the neck ring; two packing rings one of which is provided with Wear resisting flanges a ring containing a plurality of springs adapted to transmit axial pressure through the two packing rings; and a I ring containing a plurality of springs adapted to transmit radial pressure on to the two packing rings; substantially as described.

1 6-. In a metallic packing, in combination 1 the stufling box; the neck ring; a ring 0011- ring having a corresponding convex spher ical surface interposed between the packing rings and the end ring; substantially as de scribed.

In testimony whereof I have hereunto set my hand in the presence of two subscribing Witnesses.

CHARLES WILLIAM CARTER.

Witnesses:

JosEPH E. HrRsT, ALICE S. ALLEN. 

